In Style, change:

In this rule, any implied ordering of the Musicians is the order they’re listed in the GNDT, which wraps so that the last Musician listed in the GNDT is adjacent to the first Musician listed.

to

In this rule, any implied ordering of the Musicians is the order they’re listed in the GNDT, which wraps so that the last Musician listed in the GNDT is adjacent to the first Musician listed. Any value of “-” in a given Style column shall be construed as non-existant for purposes of adjacency. Example: a C-DC block in Harmony creates an automatic change to C-CC. Changing any Style value to “-” is a manual change of Style.